package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import com.atguigu.common.utils.RandomUtils;
import com.atguigu.common.vo.MemberResponseVo;
import com.atguigu.common.vo.UserLoginVo;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartFeignService;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

import static com.atguigu.common.constant.AuthServerConstant.LOGIN_USER;

@Controller
public class LoginController {

    /**
     * 发送一个请求跳转到一个页面
     * Springmvc viewController： 将请求和页面映射过来
     *
     * @return
     */
//    @GetMapping("/login.html")
//    public String loginPage() {
//        return "login";
//    }
//
//    @GetMapping("/reg.html")
//    public String regPage() {
//        return "reg";
//    }

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {

        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                //60秒内不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(), BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        String code = RandomUtils.getFourBitRandom();
        String checkCode = code + "_" + System.currentTimeMillis();
        //redis缓存验证码,  防止同一个手机60秒再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, checkCode, 10, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(phone, code);


        return R.ok();
    }


    /**  httpSession 分布式项目session会有问题，解决？
     * TODO 重定向携带数据，利用session原理，将数据放在session中，只要跳到下一个页面，取出数据后，session里面的数据就会删掉
     *
     * TODO 解决分布式session问题
     * RedirectAttributes  允许重定向携带请求域中的数据
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes, HttpSession httpSession) {
        if (result.hasErrors()) {

//            result.getFieldErrors().stream().collect(Collectors.toMap(fieldError -> {
//                return fieldError.getField();
//            },fieldError -> {
//                return fieldError.getDefaultMessage();
//            }));

            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            redirectAttributes.addFlashAttribute("errors",errors);  //添加一个只用一次的数据
            // Request method 'POST' not supported
//            httpSession.
            //校验出错，转发到注册页
//            return "forward://reg.html";
            return "redirect:http://auth.gulimall.com/reg.html";
        }
        //真正注册，调用远程服务进行注册
        //1、校验验证码 能到这里验证码肯定不是空的
        String code = vo.getCode();

        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)) {
            if (code.equals(s.split("_")[0])) {
                //删除验证码;令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证码通过   //真正注册。调用远程服务进行注册
                R r = memberFeignService.regist(vo);
                if (r.getCode() == 0) {
                    //成功
                    return "redirect:http://auth.gulimall.com/login.html";
                } else {
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                            redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }

            }  else {
                Map<String,String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                //校验出错，转发到注册页
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        } else {
            Map<String,String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            //校验出错，转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }



        //注册成功回到首页，回到登录页
//        return "redirect:/login.html";
    }

    @GetMapping("login.html")
    public String loginPage(HttpSession session) {
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute == null) {
            return "login";
        } else {
            return "redirect:http://gulimall.com";
        }
    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session) {

        //远程登录
       R login = memberFeignService.login(vo);
       if (login.getCode() == 0) {
           //成功
           vo.setNickname(vo.getLoginacct());
           MemberResponseVo vo1 = new MemberResponseVo();
           BeanUtils.copyProperties(vo,vo1);
           vo1.setNickname(vo.getNickname());
           vo1.setId(6L);

           session.setAttribute(LOGIN_USER,vo1);
           return "redirect:http://gulimall.com";
       }
       Map<String,String> errors = new HashMap<>();
       errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
        redirectAttributes.addFlashAttribute("errors",errors);
        return "redirect:http://auth.gulimall.com/login.html";
    }
}
